法向应力作用下单裂隙渗流规律的研究

An Investigation of Fluid Percolation through Single Fractures Subject to Normal Stress

对现有关于法向应力作用下单裂隙渗流的实验结果进行了系统的分析和总结,发现幂律关系(包括立方律)不足以描述单裂隙的渗流规律,并根据Sundaram等人的实验结果建立了法向应力作用下单裂隙单位水头的水流速率q与其裂隙开度b,裂隙闭合量Δb和法向应力σ之间的关系。并根据其它实验结果验证了上述关系的普适性。

On the basis of reviewing the recent experimental studies of fluid percolation through single fractures under normal stress, it is found that the power relationships(including cubic law) between aperture and fluid flow are inadequate to describe the permeability mechanism of single fracture. The relationships among unit flowrate q, fracture aperture b, fracture closure △b and normal stress σ are formulated using the experimental result of Sundaram et al. Finally, the universal of above-mentioned relationships is verified in terms of other experimental studies.